(120×120)-(119×121)=1 (120×120)-(118×122)=4 問:(120×120)-(__×
題目:
(120×120)-(119×121)=1 (120×120)-(118×122)=4 問:(120×120)-(__×__)=144
解答:
(120×120)-(108__×132__)=144
再問: 確定嗎?
再答: 120*120-(120-12)(120+12)=12*12=144
題目:
(120×120)-(119×121)=1 (120×120)-(118×122)=4 問:(120×120)-(__×__)=144
解答:
(120×120)-(108__×132__)=144
再問: 確定嗎?
再答: 120*120-(120-12)(120+12)=12*12=144
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