Question

20道初一下数学计算题如题 谢谢了

要答案

Answer 1

(1)23+(-73) =-50 (2)(-84)+(-49) =-133 (3)7+(-2.04) =-4.96 (4)4.23+(-7.57) =3.34 (5)(-7/3)+(-7/6) =-9/7 (6)9/4+(-3/2) =3/4 (7)3.75+(2.25)+5/4=6.35 (8)-3.75+(+5/4)+(-1.5) =-4 (9)(-17/4)+(-10/3)+(+13/3)+(11/3)=89/8 (10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)=2.8 (11)(+1.3)-(+17/7) =5/9 (12)(-2)-(+2/3) =-8/3 (13)|(-7.2)-(-6.3)+(1.1)|=0.2 (14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|) =-1/2 (15)(-2/199)*(-7/6-3/2+8/3) =5656/*4 (16)4a)*(-3b)*(5c)*1/6=- 98* 1. 3/7 × 49/9 - 4/3 =165/98 2. 8/9 × 15/36 + 1/27 =6/27 3. 12× 5/6 – 2/9 ×3 =28/3 4. 8× 5/4 + 1/4 =41/4 5. 6÷ 3/8 – 3/8 ÷6 =255/16 6. 4/7 × 5/9 + 3/7 × 5/9 =35/63 7. 5/2 -（ 3/2 + 4/5 ） =15 8. 7/8 + （ 1/8 + 1/9 ） 45 9. 9 × 5/6 + 5/6 =15/2 10. 3/4 × 8/9 - 1/3 =1/3 0.12χ＋1.8×0.9=7.2 (9－5χ)×0.3=1.02 6.4χ-χ=28+4.4