题目内容
递等式计算
3.2×1.4+5.62 | 51.8-4.8×(2.03-0.18) |
分析:(1)3.2×1.4+5.62根据四则运算的顺序,先算3.2×1.4,再算加;
(2)51.8-4.8×(2.03-0.18)根据四则运算的顺序先算小括号里的加,再算括号外的乘,在后算减.
(2)51.8-4.8×(2.03-0.18)根据四则运算的顺序先算小括号里的加,再算括号外的乘,在后算减.
解答:解:(1)3.2×1.4+5.62,
=4.48+5.62,
=10.1;
(2)51.8-4.8×(2.03-0.18),
=51.8-4.8×1.85,
=51.8-8.88,
=42.92.
=4.48+5.62,
=10.1;
(2)51.8-4.8×(2.03-0.18),
=51.8-4.8×1.85,
=51.8-8.88,
=42.92.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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递等式计算
3.2×1.4+5.62 | 51.8-4.8×(2.03-0.18) |