The document contains a series of math calculation exercises involving addition, subtraction, and removing brackets. There are 14 sections with multiple parts asking students to calculate various expressions such as 66 + 55, -44 - 66, 55 + (77 + 22), and (-1111) + 88. The document also provides links to online math games for practicing integers.

1. UNIT 04 December
1. Calculate.
a) 𝟔𝟔 + 𝟓𝟓 = b) +𝟒𝟒 + 𝟖𝟖 = c) +𝟏𝟏𝟏𝟏 + 𝟕𝟕 =
d) −𝟔𝟔 − 𝟐𝟐 = e) −𝟒𝟒 − 𝟔𝟔 = f) −𝟓𝟓 − 𝟗𝟗 =
g) +𝟖𝟖 + 𝟕𝟕 = h) −𝟖𝟖 − 𝟕𝟕 = i) −𝟏𝟏𝟏𝟏 − 𝟒𝟒 =
2. Calculate:
a) +𝟗𝟗 − 𝟓𝟓 = b) +𝟑𝟑 − 𝟕𝟕 = c) +𝟔𝟔 − 𝟏𝟏𝟏𝟏 =
d) −𝟐𝟐 + 𝟕𝟕 = e) −𝟏𝟏𝟏𝟏 + 𝟓𝟓 = f) −𝟏𝟏𝟏𝟏 + 𝟖𝟖 =
g) +𝟕𝟕 − 𝟏𝟏𝟏𝟏 = h) +𝟏𝟏𝟏𝟏 − 𝟒𝟒 = i) −𝟏𝟏𝟖𝟖 + 𝟏𝟏𝟏𝟏 =
3. Calculate:
a) +𝟔𝟔 − 𝟕𝟕 = b) −𝟖𝟖 + 𝟕𝟕 = c) −𝟓𝟓 − 𝟏𝟏 =
d) +𝟖𝟖 + 𝟐𝟐 = e) +𝟏𝟏𝟏𝟏 − 𝟏𝟏𝟏𝟏 = f) −𝟏𝟏𝟏𝟏 + 𝟐𝟐𝟐𝟐 =
g) +𝟏𝟏𝟏𝟏 + 𝟐𝟐𝟐𝟐 = h) −𝟏𝟏𝟏𝟏 − 𝟏𝟏𝟏𝟏 = i) −𝟏𝟏𝟖𝟖 + 𝟏𝟏𝟏𝟏 =
4. Calculate:
a) 𝟓𝟓𝟏𝟏 − 𝟐𝟐𝟐𝟐 = b) −𝟑𝟑𝟐𝟐 + 𝟒𝟒𝟒𝟒 = c) −𝟐𝟐𝟐𝟐 − 𝟑𝟑𝟑𝟑 =
d) +𝟏𝟏𝟖𝟖 + 𝟐𝟐𝟐𝟐 = e) −𝟗𝟗𝟗𝟗 + 𝟒𝟒𝟒𝟒 = f) −𝟔𝟔𝟔𝟔 − 𝟑𝟑𝟑𝟑 =
5. Calculate:
a) 𝟏𝟏𝟎𝟎 − 𝟑𝟑 − 𝟓𝟓 = b) 𝟏𝟏𝟓𝟓 − 𝟗𝟗 − 𝟔𝟔 = c) −𝟓𝟓 − 𝟖𝟖 + 𝟒𝟒 =
d) 𝟗𝟗 − 𝟑𝟑 + 𝟓𝟓 = e) −𝟐𝟐 + 𝟐𝟐 + 𝟕𝟕 = f) −𝟏𝟏𝟏𝟏 + 𝟖𝟖 + 𝟔𝟔 =
g) −𝟏𝟏𝟏𝟏 − 𝟑𝟑 + 𝟖𝟖 = h) −𝟒𝟒 − 𝟑𝟑 − 𝟐𝟐 = i) −𝟏𝟏 − 𝟓𝟓 − 𝟕𝟕 =
6. Calculate:
a) 𝟏𝟏𝟎𝟎 − 𝟐𝟐 − 𝟑𝟑 = b) 𝟏𝟏𝟐𝟐 − 𝟒𝟒 − 𝟔𝟔 = c) 𝟑𝟑 − 𝟕𝟕 + 𝟒𝟒 =
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.4.2.1

2. UNIT 04 December
d) 𝟓𝟓 − 𝟗𝟗 + 𝟖𝟖 = e) −𝟏𝟏𝟑𝟑 + 𝟔𝟔 + 𝟒𝟒 = f) −𝟐𝟐 + 𝟏𝟏𝟏𝟏 − 𝟏𝟏𝟏𝟏 =
g) −𝟏𝟏𝟏𝟏 − 𝟒𝟒 + 𝟖𝟖 = h) −𝟓𝟓 − 𝟑𝟑 − 𝟒𝟒 = i) −𝟖𝟖 + 𝟓𝟓 + 𝟔𝟔 =
7. Calculate:
a) 𝟐𝟐 − 𝟒𝟒 − 𝟓𝟓 + 𝟖𝟖 = b) 𝟔𝟔 − 𝟕𝟕 + 𝟒𝟒 − 𝟑𝟑 =
c) 𝟓𝟓 + 𝟖𝟖 − 𝟗𝟗 − 𝟔𝟔 = d) −𝟒𝟒 − 𝟗𝟗 + 𝟔𝟔 + 𝟐𝟐 =
e) −𝟑𝟑 − 𝟓𝟓 + 𝟕𝟕 + 𝟕𝟕 = f) −𝟒𝟒 − 𝟖𝟖 − 𝟐𝟐 − 𝟓𝟓 =
8. Calculate:
a) 𝟓𝟓 + 𝟕𝟕 − 𝟐𝟐 − 𝟒𝟒 = b) 𝟐𝟐 − 𝟔𝟔 + 𝟒𝟒 − 𝟗𝟗 =
c) 𝟗𝟗 − 𝟔𝟔 − 𝟕𝟕 + 𝟐𝟐 = d) −𝟒𝟒 − 𝟓𝟓 + 𝟑𝟑 + 𝟖𝟖 =
e) −𝟖𝟖 + 𝟐𝟐 − 𝟕𝟕 + 𝟔𝟔 = f) −𝟏𝟏 + 𝟓𝟓 + 𝟔𝟔 − 𝟕𝟕 =
9. Remove the brackets:
a) +(−𝟏𝟏) = b) −(+𝟒𝟒) = c) +(+𝟖𝟖) =
d) −(+𝟕𝟕) = e) +(−𝟏𝟏𝟏𝟏) = f) −(−𝟔𝟔) =
g) +(−𝟏𝟏𝟏𝟏) = h) −(−𝟏𝟏𝟑𝟑) = i) +(−𝟏𝟏𝟏𝟏) =
j) −(+𝟏𝟏𝟏𝟏) = k) +(−𝟗𝟗) = l) −(−𝟕𝟕) =
10. Remove the brackets and solve:
a) +(+𝟖𝟖) − (+𝟓𝟓) = b) −(+𝟔𝟔) − (−𝟐𝟐) =
c) +(−𝟐𝟐) + (−𝟔𝟔) = d) +(+𝟕𝟕) − (−𝟑𝟑) =
e) +(−𝟗𝟗) − (+𝟐𝟐) = f) −(+𝟔𝟔) + (+𝟒𝟒) =
11. Calculate:
a) +( 𝟓𝟓 + 𝟑𝟑) = b) +(−𝟔𝟔 − 𝟑𝟑) = c) −( 𝟖𝟖 + 𝟏𝟏𝟏𝟏) =
d) −(−𝟐𝟐 − 𝟒𝟒) = e) +( 𝟗𝟗 − 𝟕𝟕 − 𝟐𝟐) = f) +( 𝟏𝟏 − 𝟖𝟖 + 𝟑𝟑) =
g) −(−𝟔𝟔 + 𝟓𝟓 − 𝟕𝟕) = h) −( 𝟕𝟕 − 𝟓𝟓 + 𝟒𝟒) = i) +(−𝟑𝟑 − 𝟏𝟏 − 𝟒𝟒) =
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.4.2.2

3. UNIT 04 December
12. Remove the brackets and solve:
a) 𝟓𝟓 − ( 𝟗𝟗 − 𝟑𝟑) = b) 𝟕𝟕 + ( 𝟐𝟐 − 𝟖𝟖) =
c) 𝟏𝟏𝟐𝟐 + (−𝟑𝟑 + 𝟏𝟏𝟏𝟏) = d) 𝟏𝟏𝟓𝟓 − ( 𝟖𝟖 + 𝟏𝟏𝟏𝟏) =
e) +( 𝟗𝟗 − 𝟏𝟏𝟏𝟏) − 𝟐𝟐 = f) −( 𝟕𝟕 + 𝟒𝟒) + 𝟏𝟏𝟏𝟏 =
g) ( 𝟓𝟓 + 𝟖𝟖) − ( 𝟕𝟕 + 𝟔𝟔) = h) ( 𝟏𝟏𝟏𝟏 − 𝟗𝟗) − ( 𝟏𝟏𝟏𝟏 − 𝟕𝟕) =
13. Remove the brackets and solve:
a) 𝟔𝟔 + [ 𝟓𝟓 + ( 𝟕𝟕 + 𝟐𝟐)] = b) 𝟖𝟖 + [ 𝟒𝟒 − ( 𝟑𝟑 + 𝟓𝟓)] =
c) 𝟏𝟏𝟎𝟎 − [ 𝟔𝟔 + ( 𝟐𝟐 + 𝟕𝟕)] = d) 𝟏𝟏𝟓𝟓 − [ 𝟐𝟐 − ( 𝟔𝟔 − 𝟏𝟏𝟏𝟏)] =
e) 𝟏𝟏𝟓𝟓 − [ 𝟏𝟏𝟏𝟏 − ( 𝟖𝟖 + 𝟒𝟒)] = f) 𝟏𝟏𝟐𝟐 − [ 𝟕𝟕 − ( 𝟐𝟐 − 𝟏𝟏𝟏𝟏)] =
g) (−𝟔𝟔) + [ 𝟓𝟓 + ( 𝟐𝟐 − 𝟏𝟏𝟏𝟏)] = h) (−𝟕𝟕) − [ 𝟑𝟑 − ( 𝟒𝟒 − 𝟗𝟗)] =
14. Solve:
a) ( 𝟐𝟐 − 𝟏𝟏𝟏𝟏) + [ 𝟓𝟓 − (´𝟖𝟖 + 𝟐𝟐)] =
b) ( 𝟏𝟏𝟐𝟐 − 𝟑𝟑) − [ 𝟏𝟏 − ( 𝟐𝟐 − 𝟔𝟔)] =
c) [ 𝟗𝟗 − (+𝟓𝟓)] + [ 𝟕𝟕 + (−𝟏𝟏𝟏𝟏)] =
d) [ 𝟏𝟏𝟎𝟎 − (−𝟐𝟐)] − [ 𝟓𝟓 − (+𝟏𝟏𝟏𝟏)] =
e) [ 𝟖𝟖 − ( 𝟔𝟔 + 𝟒𝟒)] − ( 𝟓𝟓 − 𝟕𝟕) =
f) [ 𝟏𝟏 + ( 𝟔𝟔 − 𝟗𝟗)] − ( 𝟖𝟖 − 𝟏𝟏𝟏𝟏) =
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.4.2.3

4. UNIT 04 December
http://www.mathplayground.com/ASB_OrbitIntegers.html
http://www.mathplayground.com/ASB_SpiderMatchIntegers.html
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.4.2.4

5. UNIT 04 December
http://www.mathplayground.com/math_lines_integers.html
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.4.2.5