题目内容
脱式计算
7.1+0.9×(0.9-0.75)
420-375÷25×8+263.
7.1+0.9×(0.9-0.75)
420-375÷25×8+263.
(1)7.1+0.9×(0.9-0.75),
=7.1+0.9×0.15,
=7.1+0.135,
=7.235;
(2)420-375÷25×8+263,
=420-15×8+263,
=420-120+263,
=300+263,
=563.
=7.1+0.9×0.15,
=7.1+0.135,
=7.235;
(2)420-375÷25×8+263,
=420-15×8+263,
=420-120+263,
=300+263,
=563.
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