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20道简便运算带答案

(1)101×99 =(100+1)×99 =100×99+99 =9999 (2)14×35 =7×2×35 =7×70 =490 (3)25×28 =25×4×7 =100×7 =700 (4)4×9×25 =4×25×9 =100×9 =900 (5)43×5×4 =43×20 =860 (6)15×12 =15×2×6 =30×6 =180

62×7.1+2.9, =440.2+2.9, =443.1; 4.2×0.25, =(4+0.2)×0.25, =4×0.25+0.2×0.25, =1+0.05, =1.05; 5.2×4.3+0.8×4.3, =(5.2+0.8)×4.3, =6×4.3, =25.8. 8.5+1.5÷0.25×4, =8.5+6×4, =8.5+24, =32.5. 0.25×0.8+2.5% =0.2+2.5%, =0.225; 32×1...

以后自己写!!475+254+361=470+250+360+(5+4+1)=470+250+360+10=1090615+475+125=615+(475+125)=1215860-168+159=860-(168-159)=860-9=851第四你应该抄错了,这没法简便,应该是-358第五题直接按照顺序算=476+65-(30-1)=476+65+1-30=51...

3.4+3.4×99 =3.4×1+3.4×99

类型一:(注意:一定要括号外的数分别乘括号里的两个数,再把积相加) (40+8)×25 125×(8+80) 36×(100+50) 24×(2+10) 86×(1000-2) 15×(40-8) 类型二:(注意:两个积中相同的因数只能写一次) 36×34+36×66 75×23+25×23 63×43...

几位数的?加减乘除?简单运算多少以内的?你告诉我我写纸上给你发过来你看可以不?

类型一:(注意:一定要括号外的数分别乘括号里的两个数,再把积相加) (40+8)×25 125×(8+80) 36×(100+50) 24×(2+10) 86×(1000-2) 15×(40-8) 类型二:(注意:两个积中相同的因数只能写一次) 36×34+36×66 75×23+25×23 63×43...

1: 3/8 x-25%x=4 2: x÷4=30% 3: 3x+20%x=112 4: x-40%x=3.6 解: ﹙3/8-25%﹚x=4 解: x=30%×4 解: 3·2 x=112 解: 60%x=3·6 1/8x =4 x=1.2 x=35 x=6 x=32 5: 14%x-9.1=0.7 6: 75%x-25%x=16 7: x-20%x=44×50% 8: x-10%=18 解: 14%x=9.8 解...

1. (25%-695%-12%)*36 2. 3/4*3/5+3/4*2/5 3. (1-1/4+8/9)/7/9 4 2/3+1/6/3/24+2/21 5 1*8/15*3/5 6 10-3/4/9/10-1/6 7 [(1/3+1/2)/5/6-1/3]/1/7 8 2/3/5+3/5/2+3/4 9 1/[(2-2/3/1/2)]*2/5 10 3^2*3.25678 11 3^3-5 12 4^2-34% 13 3.25-315% 14 ...

加一个:99999-9999-999-99-4

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