數學問題15題(10分) 5天額度

1)
94 + 51 x 5
= 94 + 255
= 349

2)
21 + 34 - 26
= 55 - 26
= 29

3)
201 ÷ 31
= 201/31 or 6 15/31

4)
7456 + 98265 - 95222
= 105721 - 95222
= 10499

5)
4625 + 1321 - 2666
= 5946 - 2666
= 3280

6)
97322 - 54101 x 5
= 97322 - 270505
= -173183

7)
24680 + 13579 - 369
= 38259 - 369
= 37890

8)
9956 ÷ 661
= 9956/661 or 15 41/661

9)
234 ÷ 16 x 3
= (234 x 3)/16
= 351/8 or 43 7/8

10)
222 + 555 - 777 x 99999
= 222 + 555 - 77699223
= 777 - 77699223
= -77698446

11)
431 + 2225 - 66 x 9
= 431 + 2225 - 594
= 2656 - 594
= 2062

12)
9978 + 12345 - 21000
= 22323 - 21000
= 1323

13)
934 x 31
= 28954

14)
23 + 896 ÷ 95 - 7 x 10
= 23 + 896/95 - 7 x 10
= 23 + 896/95 - 70
= (23 x 95)/95 + 896/95 - (70 x 95)/95
= 2185/95 + 896/95 - 6650/95
= 3081/95 - 6650/95
= -3569/95 or -37 54/95

15)
93 + 226 x 10 ÷ 55
= 93 + 2260 ÷ 55
= 93 + 2260/55
= 93 + 452/11
= (93 x 11)/11 + 452/11
= 1023/11 + 452/11
= 1475/11 or 134 1/11

1.349

2.29

3.201/31=6又15/31

4.10499

5.3280

6.-173183

7.37890

8.15又41/661

9.43.875

10.-77698446

11.2062

12.1323

13.28954

14.-37又54/95

15.134又1/11