Mathematics
Junior High
Resolved
中3の工夫して計算でこれ以外のやり方ってありますか？回りくどくても大丈夫です！
033 x 27
= (30+3) (30-3)
=302-32
= 900-9.
= 891
両方をする
........
(a+b) (a-b)
= a ² 6²
9000
す
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