Math Drills

Length (cm, mm, m) Review

D-1

Word Problems (1)

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What this worksheet covers

Grade: Grade 2 (Elementary School)
Topic: Length (cm, mm, m)

Everything rests on two relationships: one tenth of 1 cm is 1 mm, and 100 cm is 1 m. Starting from Measuring with a Ruler, children restate lengths between cm and mm and between m and cm, then add and subtract within one unit and across units, including the cases that carry and borrow.

Writing 8 cm 5 mm as 805 mm rather than 85 mm stands out, since the cm part is not multiplied by 10 during the conversion. In subtraction that needs borrowing, 1 cm is never exchanged for 10 mm, so the mm parts are subtracted smaller from larger and the mm in the answer comes out too big.

From a stage that only compared the lengths of objects, this unit moves on to expressing length as a number. The sense of lining up ends to compare, built in Comparing Length, becomes the foundation for measuring with units such as cm and mm, and the units keep growing into Length (km and Tape Measure) in grade 3, where km enters the picture.

Addition (Same Units) · cm (Word Problems)1 question
Addition (Same Units) · m (Word Problems)1 question
Addition (Different Units) · m, cm (Word Problems)1 question
Addition (Different Units) · cm, mm (Word Problems)1 question
Subtraction (Different Units) · m, cm (Word Problems)1 question
Subtraction (Different Units) · cm, mm (Word Problems)1 question

Questions & answers

Problems and answers on this worksheet

These are the problems in “Length (cm, mm, m)”, shown with their answers.

(1)There is ribbon for a present, of 12cm and 8cm. Altogether, how many cm is it? Answer □
Answer: 20cm
(2)There is a 5m pole of a flag and a 10m one. How many m are there in all? Answer □
Answer: 15m
(3)The length of the bed is 1m80cm, and the length of the table is 1m15cm. Altogether, how many m and how many cm will it be? Answer □ □
Answer: 2m, 95cm
(4)At the park, there are two poles of 9cm3mm and 5cm4mm. Altogether, how long are they, in how many cm and how many mm? Answer □ □
Answer: 14cm, 7mm
(5)At home, Henry found 6m44cm of pipe. After cutting off 2m14cm, how many m and cm are left? Answer □ □
Answer: 4m, 30cm
(6)For arts and crafts at school, Noah prepared 13cm9mm of wire. After using 6cm4mm, how much will be left? How many cm and how many mm? Answer □ □
Answer: 7cm, 5mm

What to do next

Comparing Length and UnitsComparing Length and Units Reading

Next unit: Capacity (L, dL, mL)

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