1000道简便运算四年级 (8十40)x25
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四年级数学简便计算
300÷125÷8=300÷(125×8)=300÷1000=0.3
396-96-172-28 =(396-96)-(172+28)= 300-200 = 100 125*24 = 125*8*3 = 1000*3 = 3000
26*15 = (20+6)*15 = 20*15 + 6*15 = 300+90 =390 25*99*4 = 25*4*99 = 100*99 = 9900 250*32 = 250*4*8 = 1000*8 = 8000
(98+98+98+98)*25 = 4*98*25 = 4*25*98 = 100*98 = 9800 472*5*20 = 472*(5*20)= 472*100 = 47200
125*(8+800)= 125*8+125*800 = 1000 + 100000 = 101000 129*38+38*872-38 = 38*(129+872-1)=38*1000=38000 18*8*125*5 = 18*5*(125*8)=90*1000 = 9000
1384-(450+384) = 1384-384-450 = 1000-450 = 550 37*99 = 37*(100-1)= 37*100 - 37 = 3700-37=3663 82*98 = 82*(100-2)=8200- 164 = 8036
202*28 = (200+2)*28 = 200*28+2*28 =5600+56 =5656 76*105 = 76*100 + 76*5 = 7600+380 = 7980 82*14+18*14 = 14*(82+18)=14*100=1400 69*99+69 = 69*(99+1)=69*100 = 6900
49×102-2×49 125×76×8 8.33-2.43-4.57 103×32 6.7+ 2.63+4.3 41000÷8÷125 5824÷8×(85-78) 840÷28+70×18 40乘13乘25 480除以32 120除以5除以4 38乘201 45乘97-7乘45 21乘41减21
35乘22加35乘36+35乘22 44乘198 125乘25乘8乘40 95乘53加53 99乘125 45乘101减45 138-43-57-38 1.498+397
2.502-399
3.63-45-55+137
4.125×56
5.302×99+302
300÷125÷8=300÷(125×8)=300÷1000=0.3
396-96-172-28 =(396-96)-(172+28)= 300-200 = 100 125*24 = 125*8*3 = 1000*3 = 3000
26*15 = (20+6)*15 = 20*15 + 6*15 = 300+90 =390 25*99*4 = 25*4*99 = 100*99 = 9900 250*32 = 250*4*8 = 1000*8 = 8000
(98+98+98+98)*25 = 4*98*25 = 4*25*98 = 100*98 = 9800 472*5*20 = 472*(5*20)= 472*100 = 47200
125*(8+800)= 125*8+125*800 = 1000 + 100000 = 101000 129*38+38*872-38 = 38*(129+872-1)=38*1000=38000 18*8*125*5 = 18*5*(125*8)=90*1000 = 9000
1384-(450+384) = 1384-384-450 = 1000-450 = 550 37*99 = 37*(100-1)= 37*100 - 37 = 3700-37=3663 82*98 = 82*(100-2)=8200- 164 = 8036
202*28 = (200+2)*28 = 200*28+2*28 =5600+56 =5656 76*105 = 76*100 + 76*5 = 7600+380 = 7980 82*14+18*14 = 14*(82+18)=14*100=1400 69*99+69 = 69*(99+1)=69*100 = 6900
49×102-2×49 125×76×8 8.33-2.43-4.57 103×32 6.7+ 2.63+4.3 41000÷8÷125 5824÷8×(85-78) 840÷28+70×18 40乘13乘25 480除以32 120除以5除以4 38乘201 45乘97-7乘45 21乘41减21
35乘22加35乘36+35乘22 44乘198 125乘25乘8乘40 95乘53加53 99乘125 45乘101减45 138-43-57-38 1.498+397
2.502-399
3.63-45-55+137
4.125×56
5.302×99+302
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