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19.8/3.8的简便计算是什么?

19.8除以3.8的简便是19.8÷3.8≈5.21。

69.8*7.2+18.3*2.6 =70*7.2-0.2*7.2+18.3*3-18.3*0.4 =504-1.44+54.9-7.32 =558.9-8.76 =550.14 2.5*(19.8-3.7*3.8) =2.5*(19.8-3.4*4+3.7*0.2) =2.5*(19.8-13.6+0.74) =2.5*6.94 =2.5*7-2.5*0.06 =17.5-0.15 =17.35 89.3*100.1 =89.3*100...

求小林:(19.8-3.8)÷2=8,小芳:8+3.8=11.8

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 + (...

19.4✖️6.7+2.3 ×19.4 =19.4×(6.7+2.3) =19.4×9 =174.6 16.2×2+3.8✖️2 =(16.2+3.8)×2 =20×2 =40 (8+0.8)✖️1.25 =8×1.25+0.8×1.25 =10+1 =11

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