题目内容
| (10-0.92)×(1÷0.01)= | 6-1.3×(10-7.3)= |
| 75+2.08×0.5= | 80×9.47×0.125= |
分析:(1)同时运算两个小括号里面的减法和除法,再算括号外的乘法;
(2)先算小括号里面的减法,再算括号外的乘法,最后算减法;
(3)先算乘法,再算加法;
(4)运用乘法交换律简算.
(2)先算小括号里面的减法,再算括号外的乘法,最后算减法;
(3)先算乘法,再算加法;
(4)运用乘法交换律简算.
解答:解:(1)(10-0.92)×(1÷0.01),
=9.08×100,
=908;
(2)6-1.3×(10-7.3),
=6-1.3×2.7,
=6-3.51,
=2.49;
(3)75+2.08×0.5,
=75+1.04,
=76.04;
(4)80×9.47×0.125,
=80×0.125×9.47,
=10×9.47,
=94.7.
=9.08×100,
=908;
(2)6-1.3×(10-7.3),
=6-1.3×2.7,
=6-3.51,
=2.49;
(3)75+2.08×0.5,
=75+1.04,
=76.04;
(4)80×9.47×0.125,
=80×0.125×9.47,
=10×9.47,
=94.7.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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| 10-0.92= | 1-0.25= | 3.2+7.68= |
| 1÷0.01= | 1.3×2.7= | 2.08×0.5= |
| 0.66÷0.2= | 10.5÷0.03= | 2.05÷0.05= |