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计算题,注意运用简便运算.2.36+25.82+77.64-15.8222.8×98+45.64.58×25.1+45.8×6.35+0.458×11463÷3.7+11÷3.741.2×8.1+11×1.25+53.7×1.94.8×7.8+78×0.5299×86.2+86.2999.9×0.28-0.6666×37023.6-(2.017-0.44)+2.0170.25×0.2×16×1.25

题目详情
计算题,注意运用简便运算.
2.36+25.82+77.64-15.8222.8×98+45.6
4.58×25.1+45.8×6.35+0.458×11463÷3.7+11÷3.7
41.2×8.1+11×1.25+53.7×1.94.8×7.8+78×0.52
99×86.2+86.2999.9×0.28-0.6666×370
23.6-(2.017-0.44)+2.0170.25×0.2×16×1.25
▼优质解答
答案和解析
(1)2.36+25.82+77.64-15.82
=(2.36+77.64)+(25.82-15.82)
=80+10
=90;

(2)22.8×98+45.6
=22.8×98+22.8×2
=22.8×(98+2)
=22.8×100
=2280;

(3)4.58×25.1+45.8×6.35+0.458×114
=4.58×25.1+4.58×63.5+4.58×11.4
=4.58×(25.1+63.5+11.4)
=4.58×100
=458;

(4)63÷3.7+11÷3.7
=(63+11)÷3.7
=74÷3.7
=20;

(5)41.2×8.1+11×1.25+53.7×1.9
=(41.2×8.1+41.2×1.9)+(11×1.25+1.25×19)
=41.2×(8.1+1.9)+(11+19)×1.25
=41.2×10+30×1.25
=412+37.5
=449.5;

(6)4.8×7.8+78×0.52
=4.8×7.8+7.8×5.2
=(4.8+5.2)×7.8
=10×7.8
=78;

(7)99×86.2+86.2
=(99+1)×86.2
=100×86.2
=8620;

(8)999.9×0.28-0.6666×370
=333.3×0.84-333.3×0.74
=333.3×(0.84-0.74)
=333.3×0.1
=33.33;

(9)23.6-(2.017-0.44)+2.017
=(23.6+0.44)+(2.017-2.017)
=24.04+0
=24.04;

(10)0.25×0.2×16×1.25
=(0.25×0.2×2)×(8×1.25)
=0.1×10
=1.