Toán tính hợp lý :3/4-[(-3/5)-(1/12+2/9)-(-2/9-5/3)]+[97-4/3+1/3)-(6+5/4-4/3)-(5-7/4+5/3)] 18/09/2021 By Ivy tính hợp lý :3/4-[(-3/5)-(1/12+2/9)-(-2/9-5/3)]+[97-4/3+1/3)-(6+5/4-4/3)-(5-7/4+5/3)]
Đáp án: Giải thích các bước giải : 3/4-[(-3/5)-(1/12+2/9)-(-2/9-5/3)]+[(7-4/3+1/3)-(6+5/4-4/3)-(5-7/4+5/3)] =3/4+3/5+1/12-2/9+2/9+5/3+7-4/3+1/3-6-5/4+4/3-5+7/4-5/3 =(3/4-5/4)+(-2/9+2/9)+(5/3-4/3+1/3+4/3-5/3)+(-5/4+7/4)+3/5+1/12+(7-6-5) =-1/2+1/3+1/2+3/5+1/12-4 =(-1/2+1/2)+(1/3+1/12)+3/5-4 =(4/12+1/12)+3/5-4 =5/12+3/5-4 =61/60-4 =-179/60 Trả lời
Đáp án:
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Giải thích các bước giải:
Đáp án:
Giải thích các bước giải :
3/4-[(-3/5)-(1/12+2/9)-(-2/9-5/3)]+[(7-4/3+1/3)-(6+5/4-4/3)-(5-7/4+5/3)]
=3/4+3/5+1/12-2/9+2/9+5/3+7-4/3+1/3-6-5/4+4/3-5+7/4-5/3
=(3/4-5/4)+(-2/9+2/9)+(5/3-4/3+1/3+4/3-5/3)+(-5/4+7/4)+3/5+1/12+(7-6-5)
=-1/2+1/3+1/2+3/5+1/12-4
=(-1/2+1/2)+(1/3+1/12)+3/5-4
=(4/12+1/12)+3/5-4
=5/12+3/5-4
=61/60-4
=-179/60