Place the answer to calculations on a number line. An enormous array of choice. Addition, subtraction, multiplication and division. Ranging from adding numbers to 10 to multiplying 4 digit numbers. Great for combining teaching calculations and approximations with developing an understanding of place value.
KS2 Primary Framework:
Year 3:
Derive and recall multiplication facts for the 2, 3, 4, 5, 6 and 10 times-tables and the corresponding division facts. Add or subtract mentally combinations of one–digit and two–digit numbers. Give estimates for the sums and differences of two and three digit numbers. (Block A)
Round two–digit or three–digit numbers to the nearest 10 or 100 and give estimates for their sums and differences (Block A)
Use knowledge of number operations and corresponding inverses, including doubling and halving, to estimate and check calculations (Block D)
Multiply one–digit and two–digit numbers by 10 or 100, and describe the effect (Block E)
Year 4:
Derive and recall multiplication facts up to 10 × 10, the corresponding division facts and multiples of numbers to 10 up to the tenth multiple (Block A)
Use practical and informal written methods to multiply and divide two–digit numbers (e.g. 13 × 3, 50 ÷ 4) (Block A)
Add or subtract mentally pairs of two-digit whole numbers (Block A)
Use knowledge of rounding, number operations and inverses to estimate and check calculations (Block A)
Use knowledge of addition and subtraction facts and place value to derive sums and differences of pairs of multiples of 10, 100 or 1000 (Block B)
Interpret intervals and divisions on partially numbered scales and record readings accurately, where appropriate to the nearest tenth of a unit (Block C)
Develop and use written methods to record, support and explain multiplication and division of two-digit numbers by a one-digit number (Block E)
Year 5:
Use knowledge of place value and addition and subtraction of two-digit numbers to derive sums and differences and doubles and halves of decimals (Block A and Block B)
Recall quickly multiplication facts up to 10 × 10 ,derive quickly corresponding division facts. (Block A)
Use knowledge of rounding, place value, number facts and inverse operations to estimate and check calculations (Block A and Block B)
Interpret a reading that lies between two unnumbered divisions on a scale (Block C)
Year 6:
Use knowledge of place value and multiplication facts to 10 x 10 to derive related division facts involving decimals. (Block A)
Use approximations, inverse operations and tests of divisibility to estimate and check results (Block A and Block B)
Use knowledge of place value and multiplication facts to 10 × 10 to derive related multiplication and division facts involving decimals (e.g. 0.8 × 7, 4.8 ÷ 6) (Block B)
Calculate mentally with integers and decimals: U.t ± U.t, TU × U, TU ÷ U, U.t × U, U.t ÷ U (Block D)
Read and interpret scales on a range of measuring instruments, recognising that the measurement made is approximate and recording results to a required degree of accuracy; compare readings on different scales, for example when using different instruments (Block D)