(32*1/4+17)÷5/12 (25+3/4)÷1/4+1/4 18/25×9/16+7/25*9/16+9/16
人气:486 ℃ 时间:2020-03-26 19:13:34
解答
(32*1/4+17)÷5/12
=(8+17)×(12/5)
=25×(12/5)
=5×12
=60
.
(25+3/4)÷1/4+1/4
=(25+ 3/4)×4+ 1/4
=25×4 + (3/4)×4+ 1/4
=100 + 3 + 1/4
=103又1/4
.
18/25×9/16+7/25*9/16+9/16
=(18/25 +7/25 +1)*(9/16)
=2*(9/16)
=9/8
=1又1/8
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