72*98= 巧算

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72*98= 巧算

72*98= 巧算
72*98= 巧算

72*98= 巧算
72 × 98
= 72 × (100 - 2)
= 72 × 100 - 72 × 2
= 7200 - 144
= 7200 - 100 - 44
= 7100 - 44
= 7056
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=72*100-72*2=7200-144=7056

72*98
=72*(100-2)
=72*100-72*2
=7200-144
=7056

72x(100-2)=7200-144=7056

72*(100-2)=7200-144=7056

72*100-72*2

72x(100-2)=7200-144=7056

72*(100-2)=72*100-72*2=7056

72*98
=72*(100-2)
=72*100-72*2
=7200-144
=7056