Question

用简便方法计算。45x14二 97x30二 41x26十59x

用简便方法计算。45x14二 97x30二 41x26十59x26= 72x125= 104x25二 （125-50）x8=

Answer 1

45×14
=45×2×7
=90×7
=630
97×30
=(100-3)×30
=3000-900
=2100
41×26+59×26
=(41+59)×26
=100×26
=2600
72×125
=9×(8×125)
=9×1000
=9000
104×25
=(100+4)×25
=2500+100
=2600
(125-50)×8
=125×8-50×8
=1000-400
=600

Answer 2

①45×2×7
②100×30-3×30
③（41+59）×26
④8×125×9
⑤100×25+4×25
⑥125×8-50×8

Answer 3