Câu 1, 2, 3 trang 61 Vở bài tập (SBT) Toán lớp 4 tập 1: Bài 51. Nhân số 10 100 1000… chia cho số 10 100...
Câu 1, 2, 3 trang 61 Vở bài tập (SBT) Toán lớp 4 tập 1. 3. Viết số thích hợp vào chỗ chấm: 1. Tính nhẩm: a) (eqalign{ & 27 imes 10 = ldots cr & 86 imes 10 = ldots cr & 358 imes 10 = ldotscr} ) (eqalign{ & 72 imes 10 = ldotscr & 103 imes 10 = ldotscr ...
1. Tính nhẩm:
a)
| (eqalign{ & 27 imes 10 = ldots cr & 86 imes 10 = ldots cr & 358 imes 10 = ldotscr} ) |
(eqalign{ & 72 imes 10 = ldotscr & 103 imes 10 = ldotscr & 1977 imes 100 =ldots cr}) |
(eqalign{ & 14 imes 1000 = ldots cr & 452 imes 1000 = ldotscr & 300 imes 1000 = ldotscr} ) |
b)
|
(eqalign{ |
(eqalign{ |
(eqalign{ |
c)
|
(eqalign{ |
(eqalign{ |
(eqalign{ |
2. Tính:
a)
(eqalign{
& 63 imes 100:10 = ldots ldots cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = ldots ldots cr} )
b)
(eqalign{
& 960 imes 1000:100 = ldots ldots cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = ldots ldots cr} )
c)
(eqalign{
& 79 imes 100:10 = ldots ldots cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = ldots ldots cr} )
d)
(eqalign{
& 90000:1000 imes 10 = ldots ldots cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = ldots ldots cr} )
3. Viết số thích hợp vào chỗ chấm:
|
a) 160 = 16 × …… 4500 = …… × 100 9000 = 9 × …… c) 70000 = …… × 1000 70000 = …… × 100 70000 = …… × 10 |
b) 8000 = …… × 1000 800 = …… × 100 80 = …… × 10 d) 2020000 = … × 10000 2020000 = 2020 × …… 2020000 = …… × 10 |
Bài giải:
1.
a)
|
(eqalign{ |
(eqalign{ |
(eqalign{ |
b)
|
(eqalign{ |
(eqalign{ |
(eqalign{ |
c)
|
(eqalign{ |
(eqalign{ |
(eqalign{ |
2.
a)
(eqalign{
& 63 imes 100:10 = 6300:10 cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = 630 cr} )
b)
(eqalign{
& 960 imes 1000:100 = 960000:100 cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = 9600 cr} )
c)
(eqalign{
& 79 imes 100:10 = 7900:10 cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = 790 cr} )
d)
(eqalign{
& 90000:1000 imes 10 = {mkern 1mu} {mkern 1mu} 90 imes 10 cr
& ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, = 900 cr} )
3.
|
a) 160 = 16 × 10 4500 = 45 × 100 9000 = 9 × 1000 c) 70000 = …… × 1000 70000 = …… × 100 70000 = …… × 10 |
b) 8000 = 8 × 1000 800 = 8 × 100 80 = 8 × 10 d) 2020000 = 202 × 10000 2020000 = 2020 × 1000 2020000 = 202000 × 10 |
