问题
解答题
怎样简便就怎样计算.
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答案
(1)4.98+8.02×2.5,
=4.98+20.25,
=25.03;
(2)60.8-40.8÷2.5,
=60.8-16.32,
=44.48;
(3)0.8×69.6×12.5,
=(0.8×12.5)×69.6,
=10×69.6,
=696;
(4)4.98×99+4.9,
=493.02+4.9,
=497.92;
(5)6.48÷3.2÷2.5,
=6.48÷(3.2×2.5),
=6.48÷8,
=0.81;
(6)1.2×7.6+7.6×6.8,
=7.6×(1.2+6.8),
=7.6×8,
=60.8.