Bài 1: Thực hiện phép tính:
h) 84 : 4 + 39 : 37 + 50 i) 29 – [16 + 3.(51 – 49)] | j) (519 : 517 + 3) : 7 k) 79 : 77 – 32 + 23.52 l) 1200 : 2 + 62.21 + 18 m) 59 : 57 + 70 : 14 – 20 n) 32.5 – 22.7 + 83 o) 59 : 57 + 12.3 + 70 p) 5.22 + 98 : 72 q) 311 : 39 – 147 : 72 |
h)=21 + 32 + 1
=21+ 9 +1
=31
i)=29- [16 + 3.2]
=29- [16+6]
=29-22
=7
j)=(52 + 3) :7
=(25+3):7
=28 :7
=4
k)=72-9+8.25
=49-9+200
=240
l)=600+36.2+18
=600+72+18
=690
m)52+5-20
=25+5-20
=10
n)=9.5-4.7+83
=45-28+83
=100
o)52+36+1
=25+36+1
=62
p)5.4+98:49
=20+2
=22
q)32-147:49
=9-3
=6
K NHA ^^