20道豎式計(jì)算:
6.7X0.3 2.4X6.2 0.56X0.04 56X1.33.2X2.52.6X1.080.86X73.5X1612.5X42 1.3X45.2X532X151.8X237X0.860.6X0.390.37X0.41.06X2527X0.43 2.4X32.4X5
20道估算:
0.049X450.8X0.91.7X0.4572X0.817.06X2.40.7X1.23.6X0.50.25X4.780.65X2011.2X1.40.37X8.40.86X1.22.34X0.154.8X0.251.5X1052.33X41.2X3.50.8X20.5
2.4X1.924X1.9
20道簡(jiǎn)便計(jì)算:
1÷ 5×9÷ 4=
23÷ 4×2÷ 6=
76÷5×138=
87÷9×3÷19=
15÷4×1÷3=
56÷2×1÷8=
2÷9×3÷18=
1÷4×3=
12÷13×26=
19÷6×3÷2=
2÷3×7÷2=
6÷7×14÷2=
16÷7×21÷4=
29÷3×6=
1÷2×6=
1÷6×9=
4÷3×7=
9÷4×8=
3÷12×2÷9=
5÷9×7÷5=
20道脫式計(jì)算:
1.125× 3+125× 5+25× 3+25
2.9999× 3+101× 11× (101-92)
3.(23÷ 4-3÷ 4)× (3*6+2)
4. 3÷ 7 × 49÷ 9 - 4÷ 3
5. 8÷ 9 × 15÷ 36 + 1÷ 27
6. 12× 5÷ 6 – 2÷ 9 ×3
7. 8× 5÷ 4 + 1÷ 4
8. 6÷ 3÷ 8 – 3÷ 8 ÷6
9. 4÷ 7 × 5÷ 9 + 3÷ 7 × 5÷ 9
10. 5÷ 2 -（ 3÷ 2 + 4÷ 5 ）
11. 7÷ 8 + （ 1÷ 8 + 1÷ 9 ）
12. 9 × 5÷ 6 + 5÷ 6
13. 3÷ 4 × 8÷ 9 - 1÷ 3
14. 7 × 5÷ 49 + 3÷ 14
15. 6 ×（ 1÷ 2 + 2÷ 3 ）
16. 8 × 4÷ 5 + 8 × 11÷ 5
17. 31 × 5÷ 6 – 5÷ 6
18. 9÷ /7 - （ 2÷ 7 – 10÷ 21 ）
19. 5÷ 9 × 18 – 14 × 2÷ 7
20. 4÷ 5 × 25÷ 16 + 2÷ 3 × 3÷ 4