Answers to the supplementary exercises of Jiangsu Education Press

Answers to the supplementary exercises of Jiangsu Education Press

Answers to supplementary exercises in Volume 2 of Mathematics for grade 4 of Jiangsu Education Press
Four answers to the supplementary exercises of mathematics on page 1
1. 768; 384; 4608; six times 128, ten times 128
2、4890  14105  9996
3、7776  11638  13041
4. 112 × 14 = 1568 persons
Four answers to the supplementary exercises of mathematics on page 2
1、400  48  660 480  4000  480 990  2800
2、5928  8416  12285 13651  10450  10800
3. 318 × 12 = 3816 kWh
4、1380  7452  1890
Four answers to the supplementary exercises of mathematics on page 3
1、36  360  4200 360  400  680 460  4000
2、2436  5781  10506
3. 114 × 59 = 6726 minutes
4. 144 × 15 + 40 = 2200
5. 128 × 15 = 1920 Yuan & # 160; 198 × 15 = 2970 yuan 218 × 15 = 3270 Yuan & # 160; 2970 yuan
Four answers to the supplementary exercises of mathematics on page 4
1、1000       4400  8400  40000 18000  3900  4800 4200
2. Brief introduction
3、13600  9720  36400 25200  4320  6000
4、2400  7200  4000
5. 120 × 13 = 1560 households
Four answers to the supplementary exercises of mathematics on page 5
1、560      5600  5600 560  56000  56000
2、2800       360  8400  1800 6800  30000
3、7560       8100  6750  7320 8400  12720
4、64       640  6400  6400
5. 120 × 35 = 4200 square meters
Four answers to the supplementary exercises of mathematics on page 6
1、6900       960  770  30000 8400  2400  880 7900  4800
2、4320       21000  18600  2430 60000  18000
3. Express 160 × 20 = 3200km
Ordinary 106 × 20 = 2120 km
4. 350 × 20 = 7500kg = 7.5t & # 160; 7.5t > 5T & # 160; not enough
5. 90 × 8 × 30 = 21600m
Four answers to supplementary exercises of mathematics on page 7
1、640      280  6600 690  2800  6600
2、22950  11040
3、8736  11280  4260  
4、660  6300  4150 7260  6930  495
5. (1) 480 × 12 = 5760 yuan (2) 248 × 20 = 4960 yuan 4960 yuan