巧算:37×1111+7777×9肿么算

问题描述:

巧算:37×1111+7777×9肿么算

37×1111+7777×9
=37×1111+1111x7×9
=(37+63)x1111
=100x1111
=111100

37×1111+7777×9
=37×1111+1111×63
=1111×(37+63)
=1111×100
=111100

37×1111+7777×9
=37X1111+7X1111X9
=37X1111+63X1111
=(37+63)X1111
=100X1111
=111100