1樓:句哀木專屬
(du1)8.5×
[(2.36+2.42)÷0.25],
=8.5×zhi[4.78÷dao0.25],=8.5×內19.12,
=162.52;
(容2)3.9÷[(1.3+0.
6)×6-3.6],=3.9÷[1.
3×0.6+0.6×6-3.
6],=3.9÷[0.78+3.
6-3.6],
=3.9÷0.78,
=5;(3)4.25×6.3+3.7×4.25,=4.25×(6.3+3.7),
=4.25×10,
=42.5;
(4)205×0.99,
=205×(1-0.01),
=205×1-205×0.01,
=205-2.05,
=202.95;
(5)25.6-7.49-2.51,
=25.6-(7.49+2.51),
=25.6-10,
=15.6;
(6)[2.5-(6.8-4.9)]×0.8,=[2.5-1.9]×0.8,
=0.6×0.8,
=0.48.
計算下面各題,能簡算的要簡算. 8.5×(2.36+2.42)÷0.25 3.9÷1.3×6 4.25×6.3+3.7×4.25 2
2樓:手機使用者
(du1)8.5×
zhi(2.36+2.42)÷0.25,
=8.5×4.78÷0.25,
=40.63÷0.25,
=162.52;
dao(2)3.9÷1.3×6,
=3×6,
=18;
(3)4.25×6.3+3.7×4.25,=4.25×(6.3+3.7),
=4.25×10,
=42.5;
(4)205×99,
=205×(100-1),
=205×100-205×1,
=20500-205,
=20295;
(5)25.6-7.49-2.51,
=25.6-(7.49+2.51),
=25.6-10,
=15.6;
(6)2.5-(6.8-4.9)×0.8,=2.5-1.9×0.8,
=2.5-1.52,
=0.98.
用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2
3樓:ta剋
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
遞等式計算,寫出必要的計算過程,能簡便計算的用簡便方法計算:(1)7.06×2.4-5.7 (2)5.4×99+5.4
4樓:百度使用者
(1)7.06×
2.4-5.7,
=16.944-5.7,
=11.244;
(2)5.4×99+5.4,
=5.4×(99+1),
=5.4×100,
=540;
(3)9.6×72+9.6×28,
=9.6×(72+28),
=9.6×100,
=960;
(4)(1.25×2.5)×4,
=1.25×(2.5×4),
=1.25×10,
=12.5;
(5)10.4+72×0.81,
=10.4+58.32,
=68.72;
(6)11×0.6×0.4,
=6.6×0.4,
=2.64;
(7)(12.8+4.99)÷0.2,
=17.79÷0.2,
=88.95;
(8)1.25×8+2.5×4.4,
=10+2.5×0.4×11,
=10+11,
=21.
遞等式計算,能簡便計算的一定要簡便計算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.2
5樓:鄭雨328丶
(1)25×45.1
=25×(45+5.1),
=25×45+25×5.1,
=155+2.5,
=152.5;
(2)12.5×手.2
=12.5×5.8×4,
=15×4,
=45;
(手)155.t8÷t
=(tt+1.t8)÷t.
=tt÷t+1.t8÷t,
=11+5.22,
=11.22;
(4)(5.25+5.25+5.25)×4=手×(5.25×4),
=手×1,
=手;(5)5.84÷2.5÷5.4
=5.84÷(2.5×5.4),
=5.84÷1,
=5.84.
用遞等式計算,能簡算的要簡算.(1)100.18-9.6+18.53(2)0.963+23.89-0.063(3)2.5×0.3÷2.5×0.3(
6樓:我是微涼
(1)100.18-9.6+18.53,
=90.58+18.53,
=109.11;
(2)0.963+23.89-0.063,=(0.963-0.063)+23.89,=0.9+23.89,
=24.79;
(3)2.5×0.3÷2.5×0.3,
=2.5÷2.5×0.3×0.3,
=1×0.3×0.3,
=0.09;
(4)2.8×10.1,
=2.8×(10+0.1),
=2.8×10+2.8×0.1,
=28+0.28,
=28.28;
(5)51×1.2-1.2,
=(51-1)×1.2,
=50×1.2,
=60;
(6)0.36×(15.23-9.63),=0.36×5.6,
=2.016.
用遞等式計算，能簡算的要簡算1）
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