Bài 1 thực hiện phép tính nhanh nhất nếu có thể
A=4.52+36:34 B= 75:73-62.2+23.22
F=52.32+25.91 D=24.93+6.68.424.61
H=2665:[213-(21-19)3 ] P=12:{390:[500-(125+35.7)]}
C=1999+(-2000)+2001+(-2002) ...
Đọc tiếp
Bài 1 thực hiện phép tính nhanh nhất nếu có thể
A=4.52+36:34 B= 75:73-62.2+23.22
F=52.32+25.91 D=24.93+6.68.424.61
H=2665:[213-(21-19)3 ] P=12:{390:[500-(125+35.7)]}
C=1999+(-2000)+2001+(-2002) E=(-203)+134+(-97)+(-34)
A=\(4.5^2+3^6:34\)
=\(4.25+3^6:34\)
=\(100+3^6:34\)
=\(100+729:34\)
=\(100+\dfrac{729}{34}\)
=\(\dfrac{4129}{34}\)
B=\(7^5:7^3-6^2.2+2^3.2^2\)
=\(7^{5-3}-6^2.2+2^{3+2}\)
=\(7^2-36.2+2^5\)
=\(49-72+32\)
=9
F =\(5^2.3^2+25.91\)
=\(5^2.3^2+5^2.91\)
=\(5^2.\left(3^2+91\right)\)
=25.100
=2500
D=24.93+6.68.424.61
=2232+408.424.61
=2232+172992.61
= 2232+10552512
=10554744
H =\(2665:\left(213-\left(21-19\right)^3\right)\)
=\(2665:\left(213-2^3\right)\)
=\(2665:\left(213-8\right)\)
=\(2665:205\)
=\(13\)
C= 1999-2000+2001-2002
=(1999+2001)-(2000+2002)
=4000-4002
=-2
P=12:{390:[500-(125+35.7)]}
=12:{390:[500-(125+245)]}
=12:[390:(500-370)]
=12:(390:130)
=12:3
=4
E=(- 203)+134+(- 97)+(-34)
=-(203+97)+(134-34)
= -300+100
= -200