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222-9+11+12:2*14+14 = ? ( )

## Toán Lớp 6: ( 17 – 229) + ( 17 – 25 + 229) ; ( 125 – 679 + 145) – ( 125 – 679 ) 17. (15 – 16) + 16. (17 – 20) 15/ 15. (-176) + 15.76 + 100.15 1

Toán Lớp 6: ( 17 – 229) + ( 17 – 25 + 229) ;
( 125 – 679 + 145) – ( 125 – 679 )
17. (15 – 16) + 16. (17 – 20)
15/ 15. (-176) + 15.76 + 100.15
16/ 79.89 – 79. (-11) – 100.79
153.177 – 153.77 + 100. (-77)
(-29). (85 – 47) – 85. (47 – 29)
(-167). (67 – 34) – 67. (34 – 167)

1. Giải đáp:
( 17 – 229) + ( 17 – 25 + 229) ;
= ( – 212) + (17 – 25 + 229)
= ( – 212) + 221
= – 212 + 221
= 9
( 125 – 679 + 145) – ( 125 – 679 )
= ( – 409) – ( 125 – 679)
= ( – 409) – ( – 554)
=  – 409 – ( – 554)
= – 409 + 554
= 145
17. (15 – 16) + 16. (17 – 20)
= 17. ( -1) + 16( 17 – 20)
= 17. ( -1) + 16.( – 3)
= – 17 + 16. (- 3)
= – 17 – 48
= – 65
15/ 15. (-176) + 15.76 + 100.15
= 1.(- 176) + 15. 76+ 100. 15
= 1.(- 176) + 1140 + 100. 15
= 1.(- 176) + 1140 + 1500
= (- 176) + 1140 + 1500
= – 176 + 1140 + 1500
= – 176 + 2640
= 2464
16/ 79.89 – 79. (-11) – 100.79
= $\frac{16}{79}$ . 89 – 79. (-11) – 100.79
= $\frac{16}{79}$ . 89 + 869 – 100.79
= $\frac{16}{79}$ . 89 + 869 – 7900
= $\frac{1424}{79}$ + 869 – 7900
= $\frac{1424}{79}$ – 7031
= – $\frac{554025}{79}$
153.177 – 153.77 + 100. (-77)
= 27081 – 153.77 + 100. (-77)
= 27081 – 11781 + 100. (-77)
= 27081 – 11781 – 7700
= 7600
(-29). (85 – 47) – 85. (47 – 29)
= (-29). 38 – 85. (47 – 29)
= (-29). 38 – 85. 18
= – 1102 – 85. 18
= – 1102 – 1530
= – 2632
(-167). (67 – 34) – 67. (34 – 167)
= (-167). 33 – 67. (34 – 167)
= (-167). 33 – 67. ( – 133)
= – 5511 – 67. ( – 133)
= – 5511 + 8911
= 3400
$#thuanhuy$
$\text{Gửi bn}$