Question

1) 7x45+7x34= 2) 64x329+64x505= 3) 207x35-35= 4) 47x529+616x47-47.145= 5) 6.017x584-83x6.017-6.017= 6) 729x473-473x275+454x1.027=

Answer 1

1)  7*45+7*34=7(45+34)=7*79=553

2) 64*329+64*505=64(329+505)=64*834=53376

3) 207*35-35=35(207-1)=35*206=7210

4) 47*529+616*47-47=47(529+616-1)=47*1144=53768

5) 6017*584-83*6017-6017=6017(584-83-1)=6017*500=3008500

6) 729*473-473*275+454*1027=473(729-275)+454*1027=473*454+454*1027=          454(473+1027)=454*1500=681000