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4.15 3.24 9.85 6.76简便运算

(4.15+9.85)+(3.24+6.76)=14+10=24祝好好学习,天天向上!答题很辛苦,请采纳

(4.15+9.85)+(3.24+6.96)=15+10.2=25.2

15.76-(4.15-3.24)=(15.76+3.24)-4.15=19-4.15=14.85

5.74+2.68+4.26 =(5.74+4.26)+2.68 =10+2.68 =12.68 你好,本题已解答,如果满意 请点右上角“采纳答案”.

用简便计算99+3.2499+3.24=100+3.24-1=103.24-1=102.24

38.69-13.24-6.76=38.69-(13.24+6.76)=38.69-20=18.69

3.24*5.68+6.76*5.68= (3.24+6.76)*5.68=10*5.68=56.8

3.24*0.68+32.4*0.032=3.24*0.68+3.24*10x0.032=3.24x(0.68+0.32)=3.24x1=3.24

2/3-4/15*5/8=2/3-1/6=4/6-1/6=3/6=1/2

原式=4.15x2x99+8.3=8.3x99+8.3x1=8.3x(99+1)=8.3x100=830

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