1樓:血刺朱雀澴
(du1)191.3-47.2+96.9,zhi=144.1+96.9,
=241;
(2)9.63+13.78-3.63,
=9.63-3.63+13.78,
=6+13.78,
=19.78;
(3)50.03-6.5-0.5,
=50.03-(6.5+0.5),
=50.03-7,
=43.03;
(4)25×125×16,
=25×125×(
dao2×8),
=(25×2)×(125×8),
=50×1000,
=50000;
(5)2506-506×3+27,
=2506-1518+27,
=988+27,
=1015;
(6)99×63+63,
=(99+1)×63,
=100×63,
=6300.
用遞等式計算.(能簡算的要寫出簡算過程) (1)8.5×[(2.36+2.42)÷0.25] (2)3.9÷[(1.3
2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.
用遞等式計算，能簡算的要簡算1）
1 2 5 11 9 22 8 9 2 10 9 8 9 2 10 9 8 9 2 2，0 2 6 3 5 110 521 6 7 10 5 21 6 1 6 36 3 41 9.9 4.1，4.1 99 4.1，4.1 99 1 4.1 100，410 4 5 12 1 9 3 8 72 5 12...
用遞等式計算，能簡算的要簡算135
1 135 27 12 4，5 48，53 2 1620 1320 60 80，1620 22 80，1598 80，1678 3 85 14 5 5，85 70 5，155 5，31 4 520 13 43 33 520 13 10 520 130，4 5 490 210 360 12 490 2...
用遞等式計算（能簡算的要簡算1）（12 150 5 0 2）（2）18 5 2（65 23 1327（3）
1 15 3 25 10，15 65，7 5 2 內168.1 8.5 0.3 容 168.1 8.2，20.5 3 8.72 2.9 3.1 1.28，8.72 1.28 2.9 3.1 10 6，16 4 4 15 29 7 9 415，415 29 79 4 15 1，415 用遞等式計算 能...