Math Drills

Length (cm, mm, m) Review

E-5

Word Problems (2)

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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.

Subtraction (Same Units) · cm (Word Problems)1 question
Addition (With Carrying) · cm, mm (Word Problems)1 question
Addition (With Carrying) · m, cm (Word Problems)1 question
Subtraction (Same Units) · m (Word Problems)1 question
Subtraction (With Borrowing) · cm, mm (Word Problems)1 question
Subtraction (With Borrowing) · m, cm (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)At the store, Chloe bought 21cm of tape. If she uses 9cm of it, how many cm will be left? Answer □
Answer: 12cm
(2)In the crafts room, there is wire that is 15cm4mm long and 3cm9mm long. Altogether, how long is it in how many cm and how many mm? Answer □ □
Answer: 19cm, 3mm
(3)The length of the bed is 1m90cm, and the length of the table is 1m60cm. Altogether, how many m and how many cm will it be? Answer □ □
Answer: 3m, 50cm
(4)At the park, Hannah brought 9m of blue rope. After using 5m, how many m are left? Answer □
Answer: 4m
(5)At home, Olivia found 6cm2mm of tape. If she cuts off 2cm8mm, how many cm and how many mm are left? Answer □ □
Answer: 3cm, 4mm
(6)On the desk, there was 5m10cm of ribbon. If 2m40cm is cut off, how much will be left, in how many m and how many cm? Answer □ □
Answer: 2m, 70cm

What to do next

Comparing Length and UnitsComparing Length and Units Reading

Next unit: Capacity (L, dL, mL)

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