题目内容
用递等式计算,能巧算的要巧算. 5096-96×3 |
2828-144-756 |
56÷8×30 | 573-73×6 |
49÷7+160 | 7×40+60. |
分析:(1)先算乘法,再算减法,
(2)运用减法的性质简算,
(3)从左向右进行计算,
(4)先算乘法,再算减法,
(5)先算除法,再算加法,
(6)先算乘法,再算加法.
(2)运用减法的性质简算,
(3)从左向右进行计算,
(4)先算乘法,再算减法,
(5)先算除法,再算加法,
(6)先算乘法,再算加法.
解答:解:(1)5096-96×3,
=5096-288,
=4808;
(2)2828-144-756,
=2828-(144+756),
=2828-900,
=1928;
(3)56÷8×30,
=7×30,
=210;
(4)573-73×6,
=573-438,
=135;
(5)49÷7+160,
=7+160,
=167;
(6)7×40+60,
=280+60,
=340.
=5096-288,
=4808;
(2)2828-144-756,
=2828-(144+756),
=2828-900,
=1928;
(3)56÷8×30,
=7×30,
=210;
(4)573-73×6,
=573-438,
=135;
(5)49÷7+160,
=7+160,
=167;
(6)7×40+60,
=280+60,
=340.
点评:完成此题,应注意分析式中数据,掌握运算顺序,运用简便方法灵活计算.
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