Math Games

Year 3 - Number and Algebra

Standard 3.OA.1.1 - Practice solving subtraction sentences up to 1000.

Included Skills:

Number and place value
• Investigate the conditions required for a number to be odd or even and identify odd and even numbers
- identifying even numbers using skip counting by twos or by grouping even collections of objects in twos
- explaining why all numbers that end in the digits 0, 2, 4, 6 and 8 are even and that numbers ending in 1, 3, 5, 7 and 9 are odd
• Recognise, model, represent and order numbers to at least 10 000
- placing four-digit numbers on a number line using an appropriate scale
- reproducing numbers in words using their numerical representations and vice versa
• Apply place value to partition, rearrange and regroup numbers to at least 10 000 to assist calculations and solve problems
- recognising that 10 000 equals 10 thousands, 100 hundreds, 1000 tens and 10 000 ones
- justifying choices about partitioning and regrouping numbers in terms of their usefulness for particular calculations
• Recognise and explain the connection between addition and subtraction
- demonstrating the connection between addition and subtraction using partitioning or by writing equivalent number sentences
• Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation
- recognising that certain single-digit number combinations always result in the same answer for addition and subtraction, and using this knowledge for addition and subtraction of larger numbers
- combining knowledge of addition and subtraction facts and partitioning to aid computation (for example 57 + 19 = 57 + 20 � 1)
• Recall multiplication facts of two, three, five and ten and related division facts
- establishing multiplication facts using number sequences
• Represent and solve problems involving multiplication using efficient mental and written strategies and appropriate digital technologies
- writing simple word problems in numerical form and vice versa
- using a calculator to check the solution and reasonableness of the answer