Math Drills

Length (cm, mm, m) Review

E-3

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 home, Sam found 23cm of red tape. If he cuts 14cm of it, how many cm will be left? Answer □
Answer: 9cm
(2)The notebook is 18cm9mm tall and 12cm6mm wide. Altogether, how long is it in how many cm and how many mm? Answer □ □
Answer: 31cm, 5mm
(3)Sophia is 1m35cm tall. If she stands on top of a platform that is 75cm, how tall will she be — how many m and how many cm? Answer □ □
Answer: 2m, 10cm
(4)At a birthday party, Noah received 20m of yellow ribbon. After cutting off 11m, how many m are left? Answer □
Answer: 9m
(5)At home, Chloe found 10cm2mm of blue tape. If she cuts off 4cm9mm, how many cm and how many mm are left? Answer □ □
Answer: 5cm, 3mm
(6)Olivia had 3m18cm of ribbon. If 1m42cm is used, how much will be left, in how many m and how many cm? Answer □ □
Answer: 1m, 76cm

What to do next

Comparing Length and UnitsComparing Length and Units Reading

Next unit: Capacity (L, dL, mL)

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