Math Mammoth Grade 1-B Worktext (International Version) is the student worktext for the second half of grade 1 mathematics studies. In this part B, the main areas of study are: * addition and subtraction facts within 10; * clock to the half hour; * geometric shapes and measuring length; * adding and subtracting within 100; and * counting coins. The worktext is in full color, and contains both the necessary instruction and the problems & exercises (the 'text' and the 'work'), and is for the most part self-teaching. It does not contain the answers. This international version differs from the Math Mammoth US version in these ways: - It is all metric (no imperial measurement units are used); - The currency in the money chapter is the Australian dollar; - It uses British English spelling; - Page (paper) size is A4. The other parts of the Math Mammoth curriculum are: grade 1-A student worktext, grade 1 answer keys, and grade 1 tests and mixed revisions (all available on Lulu).