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36.4÷2.5竖式

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36.4÷2.5(简便运算) 解答: 36.4÷2.5 =(36.4x0.4)÷(2.5x0.4) =14.56÷1 =14.56

36.4÷2.5 =3.64/0.25=7.28/0.5=14.56 120/1.25=12/0.125=12*8=96

5D 6B 7D 8C

3.8

(1)原式=?23×24+34×24+16×24=-16+18+4=6,或原式=14×24=6;(2)原式=-6-15+2+1.5=(-6-0.2)+(2+1.5)=-6.2+3.5=-2.7;(3)原式=-144+2.5÷0.1=-144+2.5×10=-144+25=-119;(4)原式=(9-9)-3×4=0-12=-12.

36.7除以2.5除以0.4 =36.7÷(2.5×0.4) =36.7÷1 =36.7

(1)38.7+2.5×(36.4-4.8÷0.4),=38.7+2.5×(36.4-12),=38.7+2.5×24.4,=38.7+2.5×(20+4+0.4),=38.7+[2.5×20+2.5×4+2.5×0.4],=38.7+[50+10+1],=38.7+61,=99.7;(2)630÷[2.98+6.5×(3.2-3.12)],=630÷[2.98+6.5×0.08],=630÷[2.98+...

. 3/7 × 49/9 - 4/3 2. 8/9 × 15/36 + 1/27 3. 12× 5/6 – 2/9 ×3 4. 8× 5/4 + 1/4 5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 × 5/9 + 3/7 × 5/9 7. 5/2 -( 3/2 + 4/5 ) 8. 7/8 + ( 1/8 + 1/9 ) 9. 9 × 5/6 + 5/6 10. 3/4 × 8/9 - 1/3 11. 7 × 5/49 + 3/14 ...

①(4800×6+36)÷12,=(28800+36)÷12,=28836÷12,=2403;②12.4-2.4×3.75÷2.5,=12.4-9÷2.5,=12.4-3.6,=8.8;③164×5143+51×5143,=(164+51)×5143,=215×5143,=255;④35÷[(79-23)÷56],=35÷[19÷56],=35÷215,=92.

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