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  • 1. Calcule as adições e subtrações, como você preferir: ábaco, decomposição, base 10 ...a) 243+ 148 = _________ b) 46 + 45=________ c) 299 + 199= _____________d) 87+ 53 + 18=______ e) 164 + 246 =________ f) 67 + 48 + 6 =_______g) 180_ 47 =__________ h) 228 _ 143 =________ i) 166 -78 =_________j) 153 – 127 =_________ k)76 – 39=___________ l) 52 – 25=________
  • 2. Calcule multiplicações e divisõesa) 43 x 3 _________ b) 24x 5=________ c) 29 x 2= _____________d) 17x 4 =______ e) 64 x3 =______ f) 28 x 3 =______g) 36: 3 =________ h) 28 :4 =________ i) 45:5=________j) 66:2 =_________ k)100: 4=___________ l) 99: 3=________