Toán Lớp 6: Bỏ dấu ngoặc rồi tính
A (1267-196) -(267 cộng 304)
B (3965-2378)-(437-1378) -528
C (2002-79 cộng 15)-(-79 cộng15)
D -329-(15-101)-(25-440)
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Toán Lớp 6: Bỏ dấu ngoặc rồi tính
A (1267-196) -(267 cộng 304)
B (3965-2378)-(437-1378) -528
C (2002-79 cộng 15)-(-79 cộng15)
D -329-(15-101)-(25-440)
Comments ( 2 )
$\text{ @HV }$
a) (1267 – 196) – (267 + 304)
= 1267 – 196 – 267 – 304
= (1267 – 267) – (196 + 304)
= 1000 – 500
= 500
___________________________________________
b) (3965 – 2378) – (437 – 1378) – 528
= 3965 – 2378 – 437 + 1378 – 528
= [3965 – (437 + 528)] – (2378 – 1378)
= (3965 – 965) – 1000
= 3000 – 1000
= 2000
____________________________________________
c) (2002 – 79 + 15) – (-79 + 15)
= 2002 – 79 + 15 + 79 – 15
= 2002 + (79 – 79) + (15 – 15)
= 2002
___________________________________________
d) -329 – (15 – 101) – (25 – 440)
= -329 – 15 + 101 – 25 + 440
= (-329 + 101) + (-15 – 25 + 440)
= -228 + 400
= 172
a. (1267 – 196) -(267 + 304)
= 1267 – 196 – 267 – 304
= 1267 – 267 – (196 + 304 )
= 1000 – 500
= 500
.
b. ( 3965 – 2378 ) – ( 437 – 1378 ) – 528
= 3965 – 2378 – 437 + 1378 – 528
= ( 3965 – (437 + 528 ) – ( 2378 – 1378 )
= 3000 – 1000
= 2000
.
c. ( 2002 – 79 + 15 ) – ( -79 + 15 )
= 2002 – 79 + 15 + 79 – 15
= 2002 + ( -79 + 79 ) + ( 15 – 15 )
= 2002 + 0
= 2002
.
d. -329 – ( 15 – 101 ) – ( 25 – 440 )
= – 329 – 15 + 101 – 25 + 440
= – 329 + (- 15 – 25 ) + 101 + 440
= – 329 – ( 40 – 440 ) + 101
= – 329 + 101 + 400
= -228 + 400
= 172