50+390= 800+ 120= 720-50=
400+300= 300+50= 60+ 150=
74-27+35= 283+3 16≈ 159+97≈
Second, fill in. (17)
1，6cm = () mm 3km = () m () m = 80m。
2, 9000 kg = () tons of 5 kg = () grams of 4 tons = () kg.
3. 80mm = () cm 1 decimeter-5cm = () cm
4, 49 is 7 times (); Seven times () is 63.
5. It takes () seconds for the second hand to turn from the number "4" on the clock face to the number "10".
6. When looking up 756-427=329, you can use () plus () to see if it is equal to ();
Or subtract () from () to see if it is equal to ().
Three. Fill in the appropriate unit in () (10).
1, xinxin height 128 () and weight 28 (). This table is 80 ()
2, a bottle of water is 500 grams, and the weight of four bottles of water is () grams, or () kilograms.
3. The thickness of the math textbook is about 7 (), and the speed of the car is 80 ().
Xiao Ming weighs 35 (), a car carries 5 () and a whale weighs 32 ().
4. Fill in ""in brackets. (9 points)
50 mm () 60 cm 8000 g () 8 tons 6000 m () 5 km
1 ton () 800kg 700kg () 7 tons 1 decimeter () 1 cm
76( )56+35 8003( )800+3 4×9( )40
5. Give a sentence (tick "√" for the right and "×" for the wrong). ) (5 points)
1. In addition, the sum must be greater than two addends. ( )
A bag of rice weighs 45 tons. ( )
Wang Xin weighs about 28 grams.
It took five hours from 8: 30 in the morning to 3: 30 in the afternoon. ( )
5, 8 kilograms of wood is lighter than 8000 grams of bricks. ( )
Sixth, choose one. (10)
1, an elephant weighs 6 tons and 80 kilograms, or ().
6080 kg B.6800 kg C.60080 kg
2. The length of the Yangtze River is about 6200 ().
A, kilometer b, meter c, decimeter
3. The correct arrangement of the length units we have learned from big to small is ().
One kilometer, meters, millimeters, centimeters.
Kilometers, meters, centimeters, millimeters
Xiaoming started to do his homework at 4: 50, and didn't finish it until 5: 40. It took Xiaoming * * minutes to do his homework.
A, B, C, 60
5. Five times a number is 40, and nine times this number is ()
a、72 B、45 C、8 1
Seven, the vertical calculation of the column, requires checking calculation. (3 points for each inspection, *** 14 points)
259+ 148= 4 10-207=
404- 186= 755+ 165=
☆ 857+476= ☆ 304- 195=
Check calculation: Check calculation:
Eight, text questions (2 points for each question, ***6 points)
1, one number is 340, and the other number is 37 1 more than it. What is the other number?
2. What is the number of186 less than 705?
How many times 3,48 is 6?
Nine, solve the problem. (4 points for each question, ***20 points)
1, there are 203 students in grade three, 79 fewer than those in grade four. How many students are there in the third and fourth grades?
The fruit shop has 750 kilograms of fruit. I sold 284 kilograms this morning and 325 kilograms this afternoon. How many kilograms of fruit did you sell today? How many kilograms are left?
The store ships 2 1 ton of apples, which is 3 times that of pears. How many pears to send?
The supermarket brought 5000 Jin of fruit and sold 4 tons. How many kilograms of fruit are left?
5.786 kilograms of apples and 892 kilograms of pears are transported by trucks with a load of 2 tons. Can you ship it all at once?
smart city
288 yuan 760 yuan 198 yuan
(1) How much does it cost to buy a radio and a fan? ( 1)
(2) How much is it cheaper to buy a fan than an air conditioner? ( 1)
Two. Lili folded a 3.3-meter-6-cm rope twice and then cut it along the broken line. How long is each ribbon? (2 points)