one

1.

73-9= 57-8= 86+8=

24-6= 18- 10÷5= 42÷7+9=

36+2×6= 25÷( 10÷2)= (54-30)÷4=

Calculate.

(1) A weight weighs 6 grams. How many grams do seven such weights weigh?

(2) 75g-8g = 54g ÷ 9g = 25g+40g =

8 g× 7 = 67 g-19 g =

3. A pencil weighs12g, and a pen weighs 40g. How many grams are there more pens than pencils?

Reference answer

1.64; 49; 94; 18; 16; 15; 48; 5; six

2.( 1)42g(2)67g； 6 grams; 65 grams; 56 grams; 48 grams

3.28 grams

two

1. Select the appropriate company name and fill it in the horizontal line.

A bag of flour weighs 25 _ _ _ _ _ _, and a duck egg is about 60 _ _ _ _.

A truck can carry 4000 _ _ _ _ _ _, and a wax gourd weighs about10 _ _ _ _.

A piece of fruit candy weighs about 3 _ _ _ _ _, and a ball weighs about 50 _ _ _ _.

Dad weighs about 70 _ _ _ _ _ Four apples are about 500 _ _ _ _.

Calculate.

300g+1600g = 2000g+6500g-2kg =

4000g+ 1070g = 5040g+3 100g =

72g ÷ 8 = 5kg+700g =

5 1g ÷ 7 = 7kg× 9 =

1 kg+64g÷ 8 = 63kg÷ 7 =

3.

(1) Ouyang takes two toys and weighs them together. * * * weighs 30 kilograms. Now people know that each toy weighs 2 kilograms. What is Ouyang's weight?

(2) The canteen delivers 3200 kg of coal every day and 2400 kg of coal the next day. It is planned that the coal will burn for 7 months. How many kilograms of coal per month on average?

(3) The oil press squeezes 8 kilograms of oil per hour. This oil press has been working for 7 hours. How many kilograms does it take to complete the oil extraction task of 100 kg?

(4) A nickel coin weighs 2 grams, and a small square has 4 points and 5 points. How many grams does * * * weigh?