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# Grade 4 Mathematics Online Lessons on Mass

Grade Four Mathematics Online Lessons on Mass

1. Measuring mass in kilograms

2. Measuring mass using 1/2 kg masses

3. Measuring mass using 1/4 kg masses

4. Mass in 1/2 kilograms and 1/4 kilograms

5. Addition of mass in kilograms

6. Subtraction of mass in kilograms

Lessons (**21**)

- 1.
Complete the table below: Number of ½ kg masses

1m 47s - 2.
Complete the table below: Number of #1/4# kg masses

1m 51s - 3.
How many ½ kg packets can be obtained from: a) 4 kg of sugar b) 6 kg of wheat

1m 24s - 4.
How many #1/4# kg packets can be obtained from: a) 4 kg of salt? b) 6 kg of millet

1m 42s - 5.
How many kilograms of sugar are there in six #1/4# kg packets of rice?

1m 32s - 6.
Kerubo bought six kilograms of beans. She packed the beans in ½ kg packets. How many packets did she get?

1m 28s - 7.
Mbui packed two kilograms of groundnuts in #1/4# kg packets. How many packets did he get?

1m 20s - 8.
A business woman had 8 kg of sorghum. She packed the sorghum in ½ kg packets. How many packets did she get?

1m 26s - 9.
Mwilu had twelve ¼ kg packets of salt. How many kilograms of salt did he have?

1m 26s - 10.
Keziah bought eighteen ½ kg tins of cooking fat. How many kilograms of cooking fat did she buy?

1m 51s - 11.
Work out: add kilograms

1m 1s - 12.
Work out: (adding mass in kilograms)

1m 15s - 13.
Work out: a) 45 kg + 60 kg b) 59 kg + 84 kg

1m 9s - 14.
Work out: a) 144 kg + 98 kg b) 2460 kg + 540 kg

1m 11s - 15.
Lang’at bought 125 kg of maize. Ahmed bought 180 kg of maize. How many kilograms of maize did they buy altogether?

1m 1s - 16.
Kungu bought 329 kg of rice. Njeri bought 465 kg of rice. How many kilograms of rice did they buy altogether?

1m 10s - 17.
Sekunda bought 1354 kg of fertilizer in March. In April he bought 895 kg of fertilizer. How many kilograms of fertilizer did he buy altogether?

1m 24s - 18.
Work out: subtract kilograms

0m 57s - 19.
Work out: subtracting kilograms

1m 47s - 20.
Mutai had 85 kg of fish. He sold 69 kg of the fish. How many kilograms of the fish remained?

1m 17s - 21.
A trader had 850 kg of onions. She sold 575 kg of the onions. How many kilograms of onions remained?

1m 38s