=( 100-2)+( 1000-2)+( 10000-2)+( 10000-2)
= 100+ 1000+ 10000+ 10000-2-2-2-2
= 1 1 1 100-8
= 1 1 1092
(2) 1 127* 1 123
=( 1 120+7)*( 1 120+3)
= 1 120* 1 120+ 1 120*3+ 1 120*7+7*3
= 1254400+ 1 120*(7+3)+2 1
= 1254400+ 1 1200+2 1
= 126562 1
Off-model calculation.
408- 12×24 (46+28)×60 42×50- 17 15÷5
32+ 105÷5 ( 108+47)×52 420×(327-238)
(4 12 1+2389)÷7 67 1× 15-974 469× 12+ 1492
405×(32 13-3 189) 5000-56×23 125×(97-8 1)
6942+480÷3 304×32- 154 20+80÷4-20=
100÷(32-30)×0= 25×4- 12×5=
70×〔(42-42)÷ 18〕= 75×65+75×35=
Calculate the following questions in a simple way.
1、89+ 124+ 1 1+26+48 2、875- 147-23
3.25× 125×40×8 4、 147×8+8×53
5、 125×64 6、0.9+ 1.08+0.92+0. 1
Calculate in a simple way
①89+ 124+ 1 1+26+48 ②875- 147-23
③ 147×8+8×53 ④ 125×64
Calculate the following questions.
1.280+840÷24×5 2.85×(95- 1440÷24)
3.58870÷( 105+20×2) 4.80400-(4300+870÷ 15)
5. 1437×27+27×563 6.8 1432÷( 13×52+78)
7. 125×(33- 1) 8.37.4-(8.6+7.24-6.6)
Do the math. ( 1∶ 1)
( 1) 156× 107-7729 (2)37.85-(7.85+6.4)
75÷〔 138÷( 100-54)〕 85×(95- 1440÷24)
80400-(4300+870÷ 15) 240×78÷( 154- 1 15)
1437×27+27×563 〔75-( 12+ 18)〕÷ 15
2 160÷〔(83-79)× 18〕 280+840÷24×5
325÷ 13×(266-250) 85×(95- 1440÷24)
58870÷( 105+20×2) 1437×27+27×563
8 1432÷( 13×52+78) [37.85-(7.85+6.4)] ×30
156×[( 17.7-7.2)÷3] (947-599)+76×64
36×(9 13-276÷23) [ 192-(54+38)]×67
[(7. 1-5.6)×0.9- 1. 15]÷2.5 8 1432÷( 13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62] (947-599)+76×64 60-(9.5+28.9)]÷0. 18 2.88 1÷0.43-0.24×3.5 20×[(2.44- 1.8)÷0.4+0. 15] 28-(3.4 / kloc-0/.25×2.4) 0.8×〔 15.5-(3.2 1 5.79)〕 (3 1.8 3.2×4)÷5 194-64.8÷ 1.8×0.9 36.72÷4.25×9.9 3.4 16÷(0.0 16×35) 0.8×[( 10-6.76)÷ 1.2]
( 136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8 (58+37)÷(64-9×5)
8 12-700÷(9+3 1× 1 1) (3.2× 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26) 120-36×4÷ 18+35
(284+ 16)×(5 12-8208÷ 18) 9.72× 1.6- 18.305÷7
4/7÷[ 1/3×(3/5-3/ 10)] (4/5+ 1/4)÷7/3+7/ 10
12.78-0÷( 13.4+ 156.6 ) 37.8 12-700÷(9+3 1× 1 1) ( 136+64)×(65-345÷23) 3.2×( 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+ 16)×(5 12-8208÷ 18)
0. 12× 4.8÷0. 12×4.8 (3.2× 1.5+2.5)÷ 1.6
120-36×4÷ 18+35 10. 15- 10.75×0.4-5.7
5.8×(3.87-0. 13)+4.2×3.74 347+45×2-4 160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7. 1-5.6)×0.9- 1. 15] ÷2.5 (3.2× 1.5+2.5)÷ 1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷( 12-7.2)-6
3.2×6+( 1.5+2.5)÷ 1.6 (3.2× 1.5+2.5)÷ 1.6
5.8×(3.87-0. 13)+4.2×3.74
33.02-( 148.4-90.85)÷2.5
(3)287×5+96990÷3 18 (4) 1554÷[(72-58)×3]
exclusive of
2800÷ 100+789 (947-599)+76×64
1.36×(9 13-276÷23) 2.(93+25×2 1)×9
3.507÷ 13×63+498 4.723-(52 1+504)÷25
5.384÷ 12+23×37 1 6.(39-2 1)×(396÷6)
( 1) 156×[( 17.7-7.2)÷3] (2)[37.85-(7.85+6.4)] ×30
(3)28×(5+969.9÷3 18) (4)8 1÷[(72-54)×9]
57× 12-560÷35 848-640÷ 16× 12
960÷( 1500-32×45) [ 192-(54+38)]×67
138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50 704×25 25×32× 125 32×(25+ 125)
178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2 98× 199
123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16) 178×99+ 178
79×42+79+79×57 7300÷25÷4 8 100÷4÷75 75×27+ 19×2 5 3 1×870+ 13×3 10
4×(25×65+25×28) 138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50
25×32× 125 32×(25+ 125) 102×76 58×98
178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2
98× 199 123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16)
178×99+ 178 79×42+79+79×57 7300÷25÷4 8 100÷4÷75
158+262+ 138
375+2 19+38 1+225
500 1-247- 102 1-232
( 18 1+2564)+27 19
378+44+ 1 14+242+222
276+228+353+2 19
(375+ 1034)+(966+ 125)
(2 130+783+270)+ 10 17
99+999+9999+99999
7755-(2 187+755)
22 14+638+286
3065-738- 1065
899+344
2357- 183-3 17-357
2365- 1086-2 14
497-299
2370+ 1995
3999+498
1883-398
12×25
75×24
138×25×4
( 13× 125)×(3×8)
( 12+24+80)×50
704×25
25×32× 125
32×(25+ 125)
88× 125
102×76
58×98
178× 10 1- 178
84×36+64×84
75×99+2×75
83× 102-83×2
98× 199
123× 18- 123×3+85× 123
50×(34×4)×3
25×(24+ 16)
178×99+ 178
79×42+79+79×57
7300÷25÷4
8 100÷4÷75
16800÷ 120
30 100÷2 100
32000÷400
49700÷700
1248÷24
3 150÷ 15
4800÷25
2 1500÷ 125
Other questions:
2356-( 1356-72 1)
1235-( 1780- 1665)
75×27+ 19×2 5
3 1×870+ 13×3 10
4×(25×65+25×28)