1. 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
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
1.口算下面各题
(1)58+42= (2)87-45= (3)125×8=
(4)50×12= (5)804÷4= (6)134+66=
(7)1000-98= (8)720÷5= (9)0÷47=
2.先填写下面各题的运算顺序,再计算出得数。
(1)168+36-36+32=
(2)153-5×14+83=
(3)50×5÷50×5=
3.判断:对的打“√”,错的打“×”
(1)13×15与15×13表示的意义相同。( )
(2)3000÷425÷8的计算结果一定小于3000÷(425×8)的计算结果。( )
(3)两个因数的积是800,如果一个因数不变,另一个因数缩小20倍,那么积是40。( )
(4)算式:“750÷25+35×2”所表示的意义是750除以25的商;加上35的2倍,和是多少?( )
(5)24×25=6×4×25=6+100=106( )
4.用简便方法计算:
(1)3786-499
(2)32×25×125
(3)1653-338-662
(4)7987+350+2013+450
(5)38×38+62×38
(6)452+99×452
(7)201×79
(8)50×125×4×8
5.计算下面各题:
(1)340×(120-40÷8)
(2)45×(720-1957÷19)
(3)86+[4500+(2088÷36)÷2]
(4)396×[74-(4875÷15-13×21)]
(5)[1054-(174-168)]÷8
(6)6048÷[(107-99)×9]
6÷3/8–3/8÷64/7×5/9+3/7×5/95/2-(3/2+4/5)6×(1/2+2/3)8×4/5+8×11/531×5/6–5/64/5×25/16+2/3×3/42+1/3-1/4+1/5-1/6=3/4-3/5+4/5-4/6+5/6-5/7=1/2-1/2-1/2+1/2=1/100000+3-32/867=1+1/2-1/3=15265357163237515632536721653/10+1=67/68+34/35-23/24=89/90+123/124-234/235=9/7-8/5=2/1+3/2=8/5-6/1=5/3+7/2=6/7-8/3=9/8-6/5+3/1=3/2-6/3+5/2-4/3=8/5-7/3+9/2+3/1=3/7×49/9-4/38/9×15/36+1/2712×5/6–2/9×38×5/4+1/46÷3/8–3/8÷64/7×5/9+3/7×5/95/2-(3/2+4/5)7/8+(1/8+1/9)9×5/6+5/63/4×8/9-1/37×5/49+3/146×(1/2+2/3)8×4/5+8×11/531×5/6–5/69/7-(2/7–10/21)5/9×18–14×2/74/5×25/16+2/3×3/414×8/7–5/6×12/1517/32–3/4×9/243×2/9+1/35/7×3/25+3/73/14××2/3+1/61/5×2/3+5/69/22+1/11÷1/25/3×11/5+4/345×2/3+1/3×157/19+12/19×5/61/4+3/4÷2/3.8/7×21/16+1/2.101×1/5–1/5×21.50+160÷40(58+370)÷(64-45)20-144÷18+35.347+45×2-4160÷52(58+37)÷(64-9×5)95÷(64-45)178-145÷5×6+42420+580-64×21÷28812-700÷(9+31×11)(136+64)×(65-345÷23)85+14×(14+208÷26)(284+16)×(512-8208÷18)120-36×4÷18+35(58+37)÷(64-9×5)(6.8-6.8×0.55)÷8.50.12×4.8÷0.12×4.8(3.2×1.5+2.5)÷1.6(2)3.2×(1.5+2.5)÷1.6.6-1.6÷4=5.38+7.85-5.37=.7.2÷0.8-1.2×5=6-1.19×3-0.43=6.5×(4.8-1.2×4)=0.68×1.9+0.32×1.910.15-10.75×0.4-5.75.8×(3.87-0.13)+4.2×3.7432.52-(6+9.728÷3.2)×2.5
不是广告 下个“猿题库”,选 6年级,知识点。
/3*(5*(2/3))
2.(1+37%)*20
3.35/2*75%
4.30*(50/2)
5.(54+10%)/20
6.(25/3*18)*30%
7.(2+70%)*40
8.1/7*(98*(1/4)*2)
9.25%*((23+2%)*4)
10.(30+20%)/2
11.12*3/(25+20%)
12.30/(3+40%)
13.27/8*16*10%
14.(2/3)*(3+6)*(1/2)
15.45*(1/9)*24
16.(35+10%)*27
17.(45+50%)*3*1/2
and devote yourself to them,