脱式计算.步步为“赢”,胜利一定属于你!35×140-2987(+)×35÷(-)0.34×5+0.96÷32(-)÷÷[×(+)].
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解:
(1)35×140-2987,
=4900-2987,
=1913;
(2)(+)×35,
=×35+×35,
=10+7,
=17;
(3)÷(-),
=÷,
=;
(4)0.34×5+0.96÷32,
=1.7+0.03,
=1.73;
(5)(-)÷,
=÷,
=;
(6)÷[×(+)],
=÷[×],
=÷,
=.
解析分析:(1)先算乘法,再算减法;
(2)根据乘法分配律进行简算;
(3)先算减法,再算除法;
(4)先算乘法和除法,再算减法;
(5)先算减法,再算除法;
(6)先算加法,再算乘法,最后算除法.
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.