Term 3 Mathematics Revision (Updated on 23 Aug)

1 km = 1000 m 1 m = 100 cm 1 l = 1000 ml 1 kg = 1000 g 1 hr = 60 min

The mass of Object A is thrice as heavy as object B. The total mass is 24 kg. What is the mass of Object A? (1) Draw out the model that represent the word problem. (2) Label the diagram with the names and number. Use the guiding Question “Who has more?” (3) Check the model. (4) Write the number statement. (5) Write the answer statement A B 24 ? 24÷ 4 = 6 6 x 3 = 18 The mass of A is 18 kg.

40 The total height of Tom and Jerry is 400 cm. Tim is 40 cm taller than Jerry. What is the height of Tom? 400 400 - 40 = 360 360 ÷ 2 = 180 360 ? Jerry Tom 180 180 180 +40 = 220 Tom is 220 cm tall.

Container A contains 50 ml of water s more than Container B. How much water must be poured from Container A to Container B so that both container have the same amount of water? 25 25 25 50 50 ÷ 2 = 25 B A 25 ml of water must be poured from container A.

In a YOG's super sprint triathlon, the participant swims 250 m, cycles 7 km and run 1700 m. What is the total distance covered? 7 km = 7000 m 250 + 7000 + 1700 = 8950 The total distance is 8950m.

Comparing , Addition and Subtraction Fractions Always convert the unlike fractions (with different denominators) to like fractions (with same denominators) Unlike fractions Unlike fractions

Which fraction is the greatest? 2 3 is the greatest.

Simplest Form: 2,3,5,7

Addition of Time 3 hr 40 min + 2 hr 35 min 5 hr 40 min + 2 hr + 35 min 5 hr 75 min = 6 hr 15 min Is it less than 60 min? 60 min + 15 min = 1 hr 15 min

Subtraction of Time = 2 hr 80 min - 1 hr 30min 1 hr 80 min - 1 hr - 30 min = 1 hr 50 min Is 20 min more than 30 min? 3 hr 20 min - 1 hr 30 min 2 hr 60 min + 20 min

Solving Time Word Problems Time Line is the “number statement” Only include the number statement when you are adding or subtraction the time intervals. Do not include the number statement if you are finding the time (like 3 a.m.)

Pg 34, Question 1 School was dismissed at 6.25 p.m. Aini took 25 min to walk home. What time did she reach home? 6.25 p.m. 25 min ? She reaches home at 6.50 p.m. 20 min 6.45 p.m. 5 min

Pg 34, Question 3 David took 1 h 50 min to read a comic book. He finished reading at 9.35 p.m. When did he start reading the comic book? ? 1 hr 50 min 9.35 p.m. She reaches home 15 minutes before 8 p.m. She reaches home at 7.45 p.m. 8.35 p.m. 1 hr 50 min 8.00 p.m. 35 min 15 min

Question 4 Caili put a cake in the oven at 11.50 a.m. The cake took 1 h 45 min to bake. When was the cake ready? 11.50 a.m. 1 hr 45 min ? 12 noon 10 min 1 hr 35 min The cake was ready at 1.35 p.m.