a) 3. TínhA) 7080 - ( 1000 - 536 ) B) 5347 + ( 2376 - 734 )C) 2806 - ( 1134 + 950 ) - 280D) 136 × ( 668 - 588 ) - 404 × 25E) 1953 + ( 17 432 - 56 × 223 ) ÷ 16G) 6010 - ( 130 × 52 - 68 890 ÷ 83 ) 4. Tính nhanha) 1234 × 2014 + 2014 × 8766b) 1357 × 2468 - 2468 × 357c) ( 14 678 ÷ 2 + 2476 ) × ( 2576 - 2575 )d) ( 195 - 13 × 15 ) ÷ ( 1945 + 1014 )5. Tìm x , biếta. 456 + ( x - 357 ) 1362b. ( 2345 - x ) - 183 2014c. ( x - 2005 ) × 2006 0d. 480 + 45 × 4 ( x + 125 )÷ 5 + 206e. 2005 × ( x - 2006 ) 20...
Đọc tiếp
a)
3. Tính
A) 7080 - ( 1000 - 536 )
B) 5347 + ( 2376 - 734 )
C) 2806 - ( 1134 + 950 ) - 280
D) 136 × ( 668 - 588 ) - 404 × 25
E) 1953 + ( 17 432 - 56 × 223 ) ÷ 16
G) 6010 - ( 130 × 52 - 68 890 ÷ 83 )
4. Tính nhanh
a) 1234 × 2014 + 2014 × 8766
b) 1357 × 2468 - 2468 × 357
c) ( 14 678 ÷ 2 + 2476 ) × ( 2576 - 2575 )
d) ( 195 - 13 × 15 ) ÷ ( 1945 + 1014 )
5. Tìm x , biết
a. 456 + ( x - 357 ) = 1362
b. ( 2345 - x ) - 183 = 2014
c. ( x - 2005 ) × 2006 = 0
d. 480 + 45 × 4 = ( x + 125 )÷ 5 + 206
e. 2005 × ( x - 2006 ) = 2005
g. [ ( x + 50 ) × 50 - 50 ] ÷ 50 = 50
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