Câu 1:tính
a,3/4+1/8=.......... b,4/5+3/10=..............
x-5/7=3/5*1/2 x*2/3=8/8+3/4
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tính
a. 4/9 + 1/2 b. 3/8 + 1/2 c. 9/8 + 3/5 d. 5 - 3/4
câu 8: tính a) 7/15 + 4/5 b) 4/5 x 5/8 c) 2/3 - 3/8 d) 1/2 : 2/5
Tính nhanh:
a) 2/5x1/7+2/5x5/7+2/5. B) 1/5+2/8+4/5+7/8-1/8
C)24/36x10/12x36
Bài 1: Tính
a) 1/3 + 1/5 - 1/4 b) 7/8 - ( 1/4 + 2/5 ) c) 5/11 - ( 3/5 - 6/11 )
Bài 1: Tính
a) 1/3 + 1/5 - 1/4 b) 7/8 - ( 1/4 + 2/5 ) c) 5/11 - ( 3/5 - 6/11 )
Bài 2: Tìm x
a) x + 2/5 = 1/2 b) x + 3/7 = 2/5 + 3/10 c) 19/20 - x = 8/5 - 3/4
Bài 3: Tìm số tự nhiên x, biết:
a ) 4/7 < x < 1/2 + 10/3 b) 3/10 + 8/5 < x < 2/5 + 5
Giúp mình nha ^^ Ai nhanh mình Tick !!!!!!!!!❤❤
1 Rút gọn rồi tính
a 2/8+5/6=
b 1/4+6/30=
c 1/8+12/16=
d 12/18+4/3
2/ tính tổng
a 1/3+1/6+1/18
b 1/12+1/6+3/4
c 1/20+1/4+2/5
d 2/3+4/5+7/15
Tính nhanh:
a,1/3+3/4+2/3+1/4 b,3/4+3/5+2/8+4/10
c, 1/10+2/10+3/10+4/10+5/10+6/10+7/10+8/10+9/10
Tính nhanh bằng cách rút gọn rồi tính:
a.(1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9)-(1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10)
b.(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)
Ai nhanh mình tick cho!
2. Tính: A) 1/3 + 1/5 - 1/4. B) 7/8 - ( 1/4 + 2/5 ). C) 5/11 - ( 3/5 - 6/11 ). D) 5/7 - ( 19/35 - 6/15 ).